1// -*- C++ -*- 2 3// Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 4// Free Software Foundation, Inc. 5// 6// This file is part of the GNU ISO C++ Library. This library is free 7// software; you can redistribute it and/or modify it under the terms 8// of the GNU General Public License as published by the Free Software 9// Foundation; either version 3, or (at your option) any later 10// version. 11 12// This library is distributed in the hope that it will be useful, but 13// WITHOUT ANY WARRANTY; without even the implied warranty of 14// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15// General Public License for more details. 16 17// Under Section 7 of GPL version 3, you are granted additional 18// permissions described in the GCC Runtime Library Exception, version 19// 3.1, as published by the Free Software Foundation. 20 21// You should have received a copy of the GNU General Public License and 22// a copy of the GCC Runtime Library Exception along with this program; 23// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 24// <http://www.gnu.org/licenses/>. 25 26// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 27 28// Permission to use, copy, modify, sell, and distribute this software 29// is hereby granted without fee, provided that the above copyright 30// notice appears in all copies, and that both that copyright notice 31// and this permission notice appear in supporting documentation. None 32// of the above authors, nor IBM Haifa Research Laboratories, make any 33// representation about the suitability of this software for any 34// purpose. It is provided "as is" without express or implied 35// warranty. 36 37/** 38 * @file resize_fn_imps.hpp 39 * Contains implementations of cc_ht_map_'s resize related functions. 40 */ 41 42PB_DS_CLASS_T_DEC 43inline bool 44PB_DS_CLASS_C_DEC:: 45do_resize_if_needed() 46{ 47 if (!resize_base::is_resize_needed()) 48 return false; 49 resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e)); 50 return true; 51} 52 53PB_DS_CLASS_T_DEC 54void 55PB_DS_CLASS_C_DEC:: 56do_resize(size_type len) 57{ resize_imp(resize_base::get_nearest_larger_size(len)); } 58 59PB_DS_CLASS_T_DEC 60inline void 61PB_DS_CLASS_C_DEC:: 62do_resize_if_needed_no_throw() 63{ 64 if (!resize_base::is_resize_needed()) 65 return; 66 67 __try 68 { 69 resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e)); 70 } 71 __catch(...) 72 { } 73 74 _GLIBCXX_DEBUG_ONLY(assert_valid();) 75} 76 77PB_DS_CLASS_T_DEC 78void 79PB_DS_CLASS_C_DEC:: 80resize_imp(size_type new_size) 81{ 82 _GLIBCXX_DEBUG_ONLY(assert_valid();) 83 if (new_size == m_num_e) 84 return; 85 86 const size_type old_size = m_num_e; 87 entry_pointer_array a_p_entries_resized; 88 89 // Following line might throw an exception. 90 ranged_hash_fn_base::notify_resized(new_size); 91 92 __try 93 { 94 // Following line might throw an exception. 95 a_p_entries_resized = s_entry_pointer_allocator.allocate(new_size); 96 m_num_e = new_size; 97 } 98 __catch(...) 99 { 100 ranged_hash_fn_base::notify_resized(old_size); 101 __throw_exception_again; 102 } 103 104 // At this point no exceptions can be thrown. 105 resize_imp_no_exceptions(new_size, a_p_entries_resized, old_size); 106 Resize_Policy::notify_resized(new_size); 107 _GLIBCXX_DEBUG_ONLY(assert_valid();) 108} 109 110PB_DS_CLASS_T_DEC 111void 112PB_DS_CLASS_C_DEC:: 113resize_imp_no_exceptions(size_type new_size, entry_pointer_array a_p_entries_resized, size_type old_size) 114{ 115 std::fill(a_p_entries_resized, a_p_entries_resized + m_num_e, 116 entry_pointer(0)); 117 118 for (size_type pos = 0; pos < old_size; ++pos) 119 { 120 entry_pointer p_e = m_entries[pos]; 121 while (p_e != 0) 122 p_e = resize_imp_no_exceptions_reassign_pointer(p_e, a_p_entries_resized, traits_base::m_store_extra_indicator); 123 } 124 125 m_num_e = new_size; 126 _GLIBCXX_DEBUG_ONLY(assert_entry_pointer_array_valid(a_p_entries_resized);) 127 s_entry_pointer_allocator.deallocate(m_entries, old_size); 128 m_entries = a_p_entries_resized; 129 _GLIBCXX_DEBUG_ONLY(assert_valid();) 130} 131 132#include <ext/pb_ds/detail/cc_hash_table_map_/resize_no_store_hash_fn_imps.hpp> 133#include <ext/pb_ds/detail/cc_hash_table_map_/resize_store_hash_fn_imps.hpp> 134 135